Device for laying the threads over rotating stretching devices in spool spinning machines for artificial silk



MARZARI Dec. 27, 1938. H

DEVICE FOR LAYING THE THREADS OVER ROTATING STRETCHING DEVICES IN SPOOL SPINNING MACHINES FOR ARTIFI Filed 001;. 27, 1936 GIAL SILK 2 Sheets-Sheet l Xxxxmmmmu H. MARZARI 2,141,544 DS OVER ROTATING STRETCHING DEV Dec. 27, 1938.

DEVICE FOR LAYING THE THREA ICES IN SPOOL SPINNING MACHINES FOR ARTIFICIAL SILK 2 Sheets-Sheet 2 Filed Oct. 27, I936 Patented Dec. 27, 1938 V UNITED STATES PATENT OFFICE ROTATING. SPOOL SPINNING FICIAL SILK STRETCHING DEVICES IN MACHINES FOR ARTI- Hermann Marzari, Rorschach, Switzerland Application October 2'7, 1936, Serial No. 107,814 In Germany October 26,. 1935 6 Claims.

In order, in the spinning of artificial silk threads on spinning machines which work on the parallel system, to obtain threads of great strength, use is made very widely of mechanism which is interposed between the jet and the winding part and which draws out the thread and gives it a determined amount of stretching.

To obtain this stretching it has been proposed that the thread should be drawn through between several pins and that these pins should be so displaced in relation to one another that the. brak ng of the thread and thus its stretching could be increased or decreased to a desired degree. By appropriate arrangement of these pins the thread can also be allowed a perfectly free passage.

In accordance with another proposal, the threads are drawn along a flat or curved surface to which they adhere.

The thread suffers in quality with all these bra-king devices, which make use solely of sliding braking, i. e., which increase. the strength of the thread by allowing it to drag.

In addition, proposals have been made which avoid the thread being dragged. With these. J driven glass rollers are employed as drawing rollers, the thread being passed round their periphery, and their peripheral speed being less than that of the winding rollers. In consequence of this, there is produced between the drawing rollers and the winding spool a tension, and respectively a stretching of the thread, whereby the desired increase in strength is attained.

In the case of ordinary spool spinning machines, with which the thread is transferred from the full winding spool to the empty winding spool by hand, such devices have proved a success. On the other hand, when working with automatic transferring of the thread, which is effected by the spools being carried by an intermittently moved rotatable support, disadvantages have been revealed, since the thread either breaks or is wound on to the drawing roller, since the peripheral speeds of the drawing roller and of the winding spool do not match one another at the moment of exchange, when the drive has to be discontinued.

In order now to overcome these deficiencies and to render the stretching means of the driven drawing roller type capable of being used also with spool spinning machines with automatic spool change, the following new device has been created:

A movable guiding roller, which can be carried or moved circumferentially round the drawing roller which is stationarily mounted. as far as desired, determines, in accordance with its position, the degree to which the thread is passed round and held in contact with the roller. The latter proceeds via this guiding roller direct to the winding spool, and thus does not cross itself at all. By swivelling or raising of the guiding roller, the thread is lifted from the drawing roller, and its stretching thus ceases. It can then easily be transferred by hand to a new winding ,spool, or--what is specially important, and a thing which establishes the value of the new device-it can now be transferred automatically, i. e.. the automatic spool changing by means of a rotary spool carrier can be employed.

In the drawings are depicted several examples of execution of devices according to the invention, more or less diagrammatically.

Fig. 1 shows a vertical section through a spinning machine,

Fig. 2 a detail of this on a larger scale,

Figs. 3 and 4 another form of execution of the device in the two working positions,

Fig. 5 a form of execution employing a socalled spinning rim in accordance with German Patent 617,791,,

Fig. 6. a device with a rotary spool carrier, the axes. of the drawing rollers and the axes of the spools being at right angles to one another, and

Fig. '7 a form of execution of the device with a rotary spool carrierin which the axes of the drawing rollers. and spools are parallel to one another.

With all these forms of execution, the trough receiving the setting bath is marked 8, the spinning jet 9, and the drawing roller Hi.

With the forms of construction according to Figs. 1, 5, and '7, the spinning jet 9, glass tubing ll, filter l2, and filter hinge 13 form a rigid unit which is pivotable on the axis I3.

With the form of execution accordng to 3 and 4, a second joint is inserted in this unit at M.

The drawing rollers H! are integral with their shafts l5 and are driven in the direction of the arrows shown. The winding part It, wh ch like wise is driven, is arranged above the setting bath and is driven at a peripheral speed which is greater than thatof the drawing rollers ii], s) that there is therefore a stretching between the drawing roller l0 and the winding part iii. 'A thread guide I! ensures correct and proper winding on of the thread.

With the form of execution according to Fig. 1, there is on the shaft 95 at the side of each draw ing roller a loose lever 18 with gripping part l9, which. carries at its. end a guiding roller 26 a stop 22.

The thread 23 coming from the spinning jet 9 is drawn through between the guide roller 20 and the rod 2! and led through the thread guide I? to the spool I6. Directly the thread is seized by the spool, the lever I8 is swung round its axis in the direction of the arrow until it strikes against the stop 22 or another stop. In this manner the thread 23 is laid round the drawing roller It and runs round the latter by an angle at centre which can be regulated with accuracy, and which must be so great that slipping is out of the question. The thread runs over the guide roller 28 to the thread guide I! and is put by the latter on to the spool IS. The desired stretching of the thread is done on the way between the drawing roller I0 and the spool I6.

If the spool I6 has been spun full and is to, be replaced by another, the lever"! is put back in the direction opposite to that of the arrow, so that the drawing roller action, since the thread, conducted between the rod 2| and the roller 20, can no longer touch the drawing roller I0. If, therefore,in changing the spool, the thread 23 should sag strongly, the danger which has previously existed of the thread adhering to the drawing roller I0 and being 'wound round it, is here circumvented. Exactly the same line of action is taken if the thread breaks or there is any other interruption, the lever I8 being first swung into the position shown by unbroken lines in Fig. .1, and the thread being taken from the jet 9 and led to the spool without touching the drawing roller I0.

With the forms of construction according to Figs. 3 and 4, the lever I8 has one arm and is mounted on the trough 8 'on an axis 24 lying parallel to the shaft l5. In this case, a roller 25 is provided instead of the guide rod 2|. Since.

with this the thread coming from'the spinning jet 9 must be led up behind the drawing roller, the glass tubing II is lengthened accordingly and is provided with the joint I4, since without this the jet cannot be lifted up out of the setting bath.

As Fig. 4 shows, when the lever I8 has been swung back, the thread 23, guided by the rollers 29 and 25, runs up to the spool behind the drawing roller I0 and without touching it, so, that therefore leading through the thread when spinning begins is a simple and easy matter, and even when threads have a very considerable sag, ad-

hesion to the drawing roller is out of the question. L

If, after the thread has been seized by the spool, the lever I8 is swung back into the position shown in Fig. 3, the thread 23 passes round the drawing roller to the desired degree and runs over the guide roller 20 to the spool, while the roller 25 is out of action in thisposition.

With the form of execution according to- Fig. 5, a spinning rim has been taken as winding. part 36, and the second guide member, viz.,'the rod ill or the roller25, is discarded. Instead of this,

the guiding roller 20 has guide discs 26 on either side, which extend almost to the drawing roller I11. rim 36 in relation to the drawing roller III has been so contrived that the one straight linecon- I 0 is now withdrawn from ceived as'running from the jet 9 to the rim 36 does not touch the drawing roller III at any position of the thread guide.

In the working position, the roller 26 assumes the position shown in Fig. 5 on the right hand side by a broken line. If the roller 26 is swung into the position shown on the left hand side, the thread 23 passes freely from the jet to the rim and above all does not touch the drawing roller I 0, while the edges 26 of the guide roller 20 ensure that the thread cannot run 01f laterally, and that the latter when the roller 26 is swung back works properly in conjunction with the drawing roller again.

The kind of winding member which is used is quite immaterial for the present invention, as also is the manner in which it is driven, whether its axis of rotation is mounted parallel to the axis of the drawing roller II] or at an angle to the latter, whether the distance from the drawing roller and the winding member is greater or smaller, and finally, whether the winding'body is changed by hand or-automatically.

Fig. 6 shows diagrammatically a form of execution with which the axes I5 of the drawing rollers ID are perpendicular to the shaft 2'! of a rotatable spool carrier 28. With this, the one spool 29 is in the working or winding position,

and is therefore positively driven, while at 30 there is an empty spool, the previous full one having been taken away. If the spool 29 is now full, the carrier is swung in the direction of the arrow. Since atthis moment the drive of the spool 29 ceases, the danger exists of the thread sagging and being wound round the drawing roller II]. This danger is obviated by the pivotability of the guide members in the meaning of the devices described in the foregoing, since the thread runs to the spool without touching the drawing roller. As the carrier rotates further, the empty spool 30' comes into the working position and is driven, so that the thread is seized by the latter and wound on. The guide members, after connection with the new empty spool has been made, are swung round again, and the thread passes in the desired manner over the drawing roller I 0 and is stretched between the latter and the winding spool.

Fig. 7 shows a form of execution with which two rotary carriers 28 are arranged side by side. With this the axes I5 of the drawing rollers I0 lie parallel to theaxes 27 of the carriers, while the levers I8, in similar case to the form of execution according to Figs. 3 and 4, are pivotable on shafts 3| provided parallel to this direction. By a rod gear'32, 33, several'levers I8 can be coupled with one another.

At the beginning of the spinning process, or at the changing of the spools, the levers I 8 are swung round into the position indicated by broken lines,

in which position the threads 23, guided by the guide members 20 and 25, reach the spools, which are at that moment'empty, via the thread guide I'I, without touching the drawing roller Iii. Di-

at the spools 29, via the guide rollers 26 and the thread guides I1, and passing round the drawing rollers I0. When the spools 29 are full, the

carriers 28 are swung round in the direction of V V the arrows. Furthermore, the position of'the spinning Previous to this, the levers 58 are swung backinto the position indicated by broken lines, so that the threads, even although the spools 29 are no longer driven and the threads accordcannot possibly come into contact with the drawing rollers 10. As soon as the empty spools 30 have arrived in the working position and the threads have been caught up by them, the levers I8 are swung back again. into the position shown by unbroken lines, and the process of spinning and stretching continues its normal course.

It is completely in accordance with the principle of the invention if, in addition to the drawing roller, the guide roller, which determines round what extent of the periphery of the drawing roller the thread runs, is driven, either from the axis of the drawing roller, or from the axis on which the guide roller is pivoted. The drawing and guide rollers are in this case driven at the same peripheral speed. The course round the rollers is always an open one, i. e., if the guide roller is put back and stretching is discontinued, the thread passes in a straight or almost straight line from the jet to the winding roller and touches neither drawing or guide roller.

I claim:

1. In combination with a spinning jet, a stationarily mounted drawing roller, and winding means, a device for alternately laying on and disengaging the thread from said drawing roller in spool spinning machines for artificial silk, com prising guide means adjustably arranged to pivot around the stationarily mounted drawing roller ingly sag,

whereby the thread is passed around the drawing roller only when engaged by the guide means.

2. The structure of claim 1, said guide means comprising a lever rotatably mounted coaxially on the drawing roller, and guide elements for the thread carried by the lever.

3. The structure of claim 1, said guide means comprising a rotatably mounted lever, and a roller and a cranked guide rod carried by said lever.

4. The structure of claim 1, said guide means comprising a rotatably mounted lever, a roller carried at one end of said lever, a cranked rod spaced from said roller, and a stop for limiting the movement of said lever.

5. In combination with a spinning jet, a stationarily mounted drawing roller, and winding means, a device for alternately laying on and disengaging thread from said stationarily mounted drawing roller comprising a guide lever arranged between the spinning jet and winding means, guide means carried by said guide lever, and said guide lever being pivotably mounted in relation to the drawing roller whereby the thread is passed around the drawing roller only when the thread is engaged by the guide means carried by the guide lever.

6. The structure of claim 5, means operable by a rod gear.

HERMANN MARZARI.

and said guide 

